Draft-regulator for steam-boilers.



PATENTED MAR. 14, 1905. 0.. R. SAGKETT & H. M. RIEGER.

DRAFT REGULATOR FOR STEAM BOILERS. APPLICATION FILED APR. 23,1904.

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No. 785.049. PATENTED MAR. 14, 1905. O. R. SAGKETT & H. M. RI'BGER.

DRAFT REGULATOR FOR STEAM BOILERS.

. APPLICATION FILED 11 3,23. 1904.

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' ,Hermazz ill-Hie el NITED STATES Patented March 14, 1905.

PATENT OFFICE.

ORVILLE R. SACKETT AND HERMAN M. RIEGER, OF NIAGARA FALLS,

NEW YORK.

DRAFT-REGULATOR FOR STEAM-BOILERS.

SPECIFICATION forming part of Letters Patent No. 785,049, dated March 14, 1905.

Application filed April 23, 1904. Serial No, 204,627-

To all whom it may concern.-

Be it known that we, ORVILLER. SACKETT and I'IERMAN M. RIEGER, citizens of the United States, residing at Niagara Falls, in the county of Niagara and State of New York, have invented new anduseful Improvements in Draft-Regulators for Steam Boilers, of which the following is a specification.

Our invention relates to improvements in draft-regulators for tubular steam-boilers; and the object is to simplify and improve the existing art by providing a conveniently-adjustable damper or plate within the smoke chamber of the boiler.

The invention consists in the novel construction of parts and their aggroupment in operative combinations, as will hereinafter be fully specified and the asserted novelty then particularly pointed out and distinctly claimed.

The invention embodies a plate erected within the smoke-space of the boiler, a verticallysliding damper or plate combined therewith, and means to regulate and adjust the sliding plate. v

We have clearly and fully illustrated the improvements in the annexed drawings, forming a part of this specification, reference being had thereto.

Figure 1 is a side elevation of a locomotiveboiler of a well-known type, showing the outside lever connections for operating and adjusting the regulator located within the smokespace of the boiler. Fig. 2 is a vertical longitudinal section through the smoke-space and including a portion of the tubular section of the boiler and showing the draft-regulator in vertical section. Fig. 3 is a vertical transverse section through the shell of the smokespace and a front elevation of the draft-regulator.

In the drawings similar reference notations appearing in different illustrations refer to similar parts.

While we have illustrated the improvements as being applied to a locomotive-boiler, they may with equal utility be placed in all horizontal boilers of the tubular type.

Referring to the drawings, A designates the shell of the boiler, which is made up in the interior with the usual tubular section B and smoke space or chamber 0, the latter of which opens into the smoke-stack D. These elements and parts may be of any approved type and do not enter into the invention further than they may contribute elements of legitimate combinations.

In the-smoke-space of the boiler is secured a downwardly-extending plate 1, which may be inclined from its upper end to its lower end in direction of the boiler-head, substantially as seen in the drawings, and formed with a draft-opening 2, over which is arranged a reticulated wire shield to act as a strainer for the sparks and soot flowing in that direction. The wire-netting is designated by the reference 3. To the outer face of the stationary plate 2 is secured a plate or apron 4, spaced or set off from the face of the plate 2, so as to make room between the plates for the disposition of the sliding damper or regulator, substantially as indicated in Fig. 2 of the drawings. 5 designates the damper plate or regulator, which is slidably positioned between the plates 1 and 4 and extends a proper distance below the lower edges of both, as indicated. In the lower exposed part of the damper-plate are fixed staples or eyes 6, to which are pivotally hung hanger-bars 7 sufficient in number to warrant the unobstructed regular movement of the damper-plate in its seat between the other plates.

8 designates a crank-shaft journaled across the boiler-shell and having a crank-arm for each of the hanger-bars 7, which have their upper ends loosely secured to the bridges of the cranks, substantially as shown in the drawings, Figs. 2 and 3. The one end of the crank-shaft 8 extends outside of the boiler, and on the projecting end is mounted a pin ion 9, which is engaged by a sector-rack 10 on the upper end of a lever 11, the lower end of the lever being connected to the end of a pull-bar 12, running'closely adjacent and parallel with the footlooard 13 and having its other end connected to the lower end of a lever 14:, fulcrumed to a stand 15, on which is the usual sector-rack 16. To the hand end of the lever is secured a spring-actuated pawl 17,

which engages with the rack and holds the levers in such positionas may be required.

To operate the damper-plate, the lever 14 is operated, which communicates a like movement to the lever 11, which turns the sector 10 and rotates the pinion 9 on the end of the crank-shaft, the result being that the cranks lift or lower the damper-plate correspondingly, and the draft of the flues is regulated accordingly.

We do not desire to be restricted to the precise system of leverage illustrated, since other connections may be substituted and serve the purposes intended.

Having thus described our invention, what we claim is The combination with a smoke-space of a tubular boiler, of a draft-regulator comprising a stationary depending plate reaching partly across the vertical diameter of the smoke-space and formed with an always-open slot in its upper portion, a screen coveringsaid slot, 2. guide-plate secured to the stationary plate below the slot, a damper slidably positioned between the stationary and guide plates, a transverse shaft having a plurality of cranks mounted within the smoke-space, one end of said shaft extending outside the boiler, bars hung to the cranks and having their lower ends connected to the lower edge of the slidable damper-plate, a pinion on the outer end of the shaft, a swinging sector meshing with said pinion, a rod connected to the sector, whereby the pinion may be oscillated to rock the crank-shaft to raise and lower the damper-plate, and a lever for reciprocating said rod, substantially as described.

In testimony whereof we affix our signatures in presence of two witnesses.

ORVILLE R. SAOKETT. HERMAN M. RIEGER. Witnesses:

F. B. KANE, THOMAS MAJIONEY. 

